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            <div>LEF 5.8 C&#47;C++ Programming Interface  (Open Licensing Program)</div>
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      <h1>7<a name="1008781">&nbsp;</a></h1>
      <h1><a name="1014156">LEF Compressed File Routines</a></h1>
      <p><a name="1019932">The Cadence</a><font color="#000000"><sup>&#174;</sup></font> Library Exchange Format (LEF) reader provides the following routines for opening and closing compressed LEF files. These routines are used instead of the <font size="2" face="'Courier New'" color="#000000">fopen</font> and <font size="2" face="'Courier New'" color="#000000">fclose</font> routines that are used for regular LEF files. </p>
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            <td><a href="#1014302" title="7" name="1014158"><font color="Blue"><u>lefGZipOpen</u></font></a><a href="#1014302" title="7"> </a></td>
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            <td><a href="#1014311" title="7" name="1021275"><font color="Blue"><u>lefGZipClose</u></font></a><a href="#1014311" title="7"> </a></td>
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            <td><a href="#1021641" title="7" name="1022190"><font color="Blue"><u>Example</u></font></a><a href="#1021641" title="7"> </a></td>
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      </div>
      <h3><a name="1014302">lefGZipOpen</a></h3>
      <p><a name="1022170">Opens a compressed LEF file. If the file opens with no errors, this routine returns a pointer to the file.</a></p>
      <h4><a name="1022171">Syntax</a></h4>
      <dl>
        <font size="2" face="'Courier New'" color="#000000"><a name="1020526">lefGZFile lefGZipOpen(<dd>const char* </a><font size="2" face="'Courier New'" color="#000000"><em>gzipFile</em></font>,<dd>const char* <font size="2" face="'Courier New'" color="#000000"><em>mode</em></font>);</font>
      </dl>
      <h4><a name="1022176">Arguments</a></h4>
      <p>
        <strong></strong>
        <strong><a name="1022177"><font size="2" face="'Courier New'" color="#000000"><em>gzipFile</em></font></a></strong>
      </p>
      <blockquote><a name="1022703">Specifies the compressed file to open. </a></blockquote>
      <p>
        <strong></strong>
        <strong><a name="1022178"><font size="2" face="'Courier New'" color="#000000"><em>mode</em></font></a></strong>
      </p>
      <blockquote><a name="1022715">Specifies how to open the file. Compressed files should be opened as read only; therefore, specify </a><font size="2" face="'Courier New'" color="#000000">"r"</font>. </blockquote>
      <h3><a name="1014311">lefGZipClose</a></h3>
      <p><a name="1020648">Closes the compressed LEF file. If the file closes with no errors, this routine returns zero.</a></p>
      <h4><a name="1020569">Syntax</a></h4>
      <dl>
        <font size="2" face="'Courier New'" color="#000000"><a name="1020570">int lefGZipClose(<dd>lefGZFile </a><font size="2" face="'Courier New'" color="#000000"><em>filePtr</em></font>) ;</font>
      </dl>
      <h4><a name="1020593">Arguments</a></h4>
      <p>
        <strong></strong>
        <strong><a name="1020996"><font size="2" face="'Courier New'" color="#000000"><em>filePtr</em></font></a></strong>
      </p>
      <blockquote><a name="1022723">Specifies a pointer to the compressed file to close. </a></blockquote>
      <h3><a name="1021641">Example</a></h3>
      <p><a name="1021642">The following example uses the </a><font size="2" face="'Courier New'" color="#000000">lefGZipOpen</font> and <font size="2" face="'Courier New'" color="#000000">lefGZipClose</font> routines to open and close a compressed file. </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1021968">lefrInit() ;</a></font>
      </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022237">&nbsp;</a></font>
      </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022238">for (fileCt = 0; fileCt &#60; numInFile; fileCt++) {</a></font>
      </p>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022240">lefrReset();</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022236">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022339">&#47;&#47; Open the compressed LEF file for the reader to read</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022248">if ((f = lefGZipOpen(inFile[fileCt], "r")) == 0) {</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022249">&nbsp;&nbsp;&nbsp;fprintf(stderr, &#34;Couldn't open input file '%s'\n&#34;, inFile[fileCt]);</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022262">&nbsp;&nbsp;&nbsp;return(2) ;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022270">}</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022271">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022314">(void)lefrEnableReadEncrypted();</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022316">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022324">&#47;&#47; Initialize the lef writer. Needs to be called first.</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022317">status = lefwInit(fout); </a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022281">if (status != LEFW_OK)</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022333">&nbsp;&nbsp;&nbsp;return 1;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022334">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022335">res = lefrRead((FILE*)f, inFile[fileCt], (void*)userData);</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022337">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022336">if (res)</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022282">&nbsp;&nbsp;&nbsp;fprintf(stderr, "Reader returns bad status.\n", inFile[fileCt]);</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022283">&nbsp;</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022305">&#47;&#47; Close the compressed LEF file. </a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022284">lefGZipClose(f);</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022285">(void)lefrPrintUnusedCallbacks(fout);</a></font>
      </blockquote>
      <blockquote>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"></font>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022338">&nbsp;</a></font>
      </blockquote>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022286">}</a></font>
      </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022291">fclose(fout);</a></font>
      </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022292">&nbsp;</a></font>
      </p>
      <p>
        <font size="2" face="&quot;Courier New&quot;" color="#000000"><a name="1022293">return 0;}</a></font>
      </p>
      <p><a name="1021974">&nbsp;</a></p>
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